DEEPSOIL和FLAC3D一维土层地震反应分析对比研究  

Contrasting study of seismic response analysis for 1-D soil layers on DEEPSOIL and FLAC3D

作　　者：梁腾龙 骆星宇 周东[1,2] 覃钊 LIANG Teng-long;LUO Xing-yu;ZHOU Dong;QIN Zhao(College of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Key Laboratory of Disaster Prevention and Engineering Safety of Guangxi,Nanning 530004,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西防灾减灾与工程安全重点实验室,广西南宁530004

出　　处：《广西大学学报（自然科学版）》2022年第2期377-387,共11页Journal of Guangxi University（Natural Science Edition）

基　　金：国家自然科学基金项目(51378132)。

摘　　要：以不同非线性程度的简化土层剖面和日本KiK-net台网的台站场地为研究对象,分别采用FLAC3D和DEEPSOIL进行土层地震反应分析。通过对比地表反应谱和地震动峰值,验证运用FLAC3D软件进行一维土层非线性地震反应计算的可行性。计算结果表明:在简化土层剖面计算中,FLAC3D与DEEPSOIL计算结果较为接近;虚假共振现象导致DEEPSOIL非线性频域分析的地表反应谱峰值大于FLAC3D与DEEPSOIL时域分析的。在台站场地土层剖面的计算中,非线性场地的计算结果较黏弹性场地更为接近实测值。刚性基岩模型的计算结果在短周期范围较为准确,而采用露头运动参考点的柔性基岩计算结果在长周期范围内更为合理。Through studying different heterogeneities subsoil profiles and Japanese KiK-net strong motion observation network,a comparative on DEEPSOIL and FLAC3D for 1-D seismic site response is presented.The effect of using FLAC3D to calculate the seismic response of nonlinear soil layer is verified by comparing the ground motion peak values and response spectrums of calculated and measured values.The results of subsoil profiles response analyses indicate that the calculated values of FLAC3D are close to that of the DEEPSOIL.Due to spurious resonances,the surface acceleration response spectra of DEEPSOIL with frequency domain method is higher than that of FLAC3D and DEEPSOIL with time domain method on nonlinear site.The results of KIK-net site response analysis indicate that the nonlinear layers are closer to the measured values than the viscoelastic layer in the surface acceleration response spectra.The results of rigid bedrock are accurate in the high frequency range,while the results of elastic bedrock with outcrop motion are more reasonable in the low frequency range.

关 键 词：FLAC3D DEEPSOIL 一维土层地震反应分析 频域分析 时域分析 

分 类 号：P315[天文地球—地震学]